BS EN 16782:2016
$142.49
Conservation of cultural heritage. Cleaning of porous inorganic materials. Laser cleaning techniques for cultural heritage
| Published By | Publication Date | Number of Pages |
| BSI | 2016 | 28 |
This European standard applies to porous inorganic materials constituting cultural heritage. It provides the fundamental requirements of the laser parameters and guidelines for the choice of the laser operational parameters, in order to optimize the cleaning procedure.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 4 | Contents Page |
| 5 | European foreword |
| 6 | Introduction |
| 7 | 1 Scope 2 Normative references 3 Terms and definitions |
| 10 | 4 Symbols and abbreviations |
| 11 | 5 Key features of the laser system with respect to the cleaning of porous inorganic materials 5.1 General 5.2 Wavelength 5.3 Laser pulse duration 5.4 Regime of pulsed emission |
| 12 | 5.5 Stability of laser emission 5.6 Transmission system of the radiation 5.7 Handpiece 5.8 Irradiated area 5.9 Targeting system 6 Preliminary cleaning tests for selecting laser operating parameters 6.1 General |
| 13 | 6.2 Working fluence |
| 14 | Table 1 — Indicative documentation of a laser cleaning test on a lithotype with two layers |
| 15 | Figure 1 — Diagram of the optimal range of working fluence determined in the cleaning tests of Table 1. Within that fluence range, an effective removal of the layer A and no visual damage of the layer B are obtained 6.3 Working spot size 6.4 Repetition rate 7 Cleaning test report 7.1 Laser instrument |
| 16 | 7.2 Preliminary tests for selecting laser operating parameters |
| 17 | Annex A (informative) Measurement of the ablation curve Figure A.1 — Ablation curve related to laser fluence |
| 18 | Annex B (informative) Optical absorption |
| 19 | Annex C (informative) Duration of laser pulse |
| 20 | Annex D (informative) Role of water |
| 21 | Annex E (informative) Repetition frequency Figure E.1 — Behaviour of the cumulative thermal effect |
| 22 | Annex F (informative) Reflectance measurement Figure F.1 — Example of apparatus with integrating sphere for reflectance measurement |
| 23 | Annex G (informative) Possible harmful effects of laser cleaning on objects |
| 24 | Annex H (informative) Health and safety |
| 25 | Bibliography |
